Boiler unit



Jan. 16, 1951 Filed June 11, 1948 FIG. 1.

G. STEINER BOILER UNIT 2 Sheets-Sheet 1 n 1N VEN TOR.

ATTORNEYS.

G. STEINER BOILER UNIT Jan. 16, 1951 2 Sheets-Sheet 2 Filed June 11,1948 IN VEN TOR. GEORGE STE/N58,

Patented Jan. 16, 1951 UNITED STATES, PATENT I ()FFICE GeorgeSteinen'New Haven, Mich.

Application June 11, 1948; Serial No. 32,381

This invention relates to fluid heaters, and more particularly to a hotwater heater for use as a boiler in a heating system.

A main object of the invention is to provide a novel and improved boilerwhich is simple in construction, compact in size, easy to maintain,

and which utilizes the heat from the heating source with a maximumdegree of efficiency, whereby the boiler is very economical in fuelconsumption.

' A further object of the invention is to provide an improved boiler foruse in heating systems and the like, wherein the products of combustionare maintained in close heat-conducting relation to the water chamber,said chamber being arranged in a very compact manner and with maximumexposure to the'products of combustion, the boiler being inexpensive tomanufacture, rugged in construction, and cheap to operate.

Further objects and advantages of the invention will become apparentfrom the following description and claim and from the accompanyingdrawings, wherein:

Figure 1 is a vertical cross-sectional view taken through a boilerconstructed in accordance with the present invention.

Figure 2 is another vertical cross-sectional view of the boiler taken online 2-2 of Figure 1.

Referring to the drawings, the boiler unit comprises a base shell H inwhich is positioned a suitable burner I2, such as an oil burner, thefuel conduits for the burner being shown at I3, I3. Shell II is providedwith a conventional hinged door I4 and is formed at its top margin withan outwardly projecting flange I5. Designated at I6 is the boiler mainhousing, said main housing being formed with a bottom flange IIsupported on said flange I5 and secured to flange I5 as by bolts I8.

The housing I6 is generally rectangular in plan and the walls thereofare hollow, defining a water jacket I9. Water jacket I9 extends aroundthe top and sides of housing I6 except for a portion of one side of saidhousing, at which a door 20 is provided. The water jacket may beconsidered to be formed of an inner casing open at one end and havingits open end resting on base II and a second casing surrounding andspaced from said first casing and fixedly secured thereto to form thewater jacket I9.

Designated at 2| is a flat vertically rising zigzag or serpentine waterconduit secured within housing I6 and extending for the full internalwidth thereof. At one, side said conduit is secured to an inner wall 22of the back wall of the 1 Claim. (Cl.,122-,-165) water jacket I9. At theother side said conduit is abutted by door 20. The lower end of theconduit 2| is connected to the bottom portion of Water jacket I9 by ashort pipe section 23. The top end of conduit 2| is connected to the topof the water jacket I9 by another short pipe section 24. Connected tothe top of the water jacket I9 are outlet conduits .26, 25, leading tothe radiators of the system. Connected to the bottom portion of saidwater jacket is the cold water return conduit 21.

Securedto the inner walls of the Water jacket and coextensive in widthwith the flat zig-zag Jconduit 2| are alternating baffle plates 28extending horizontally in the planes of the respective bends of theconduit 2| but spaced at their inner ends from the bends to provide fluepassages 29 for the upwardly flowing gaseous products of combustiongenerated by the burner I2. Formed integrally with the housing andextending partly in jacket I9 is a flue 3!] provided at its top end witha duct portion 3| communicating with the flue space above the top end ofthe flat water conduit 2|. Flue 3B is connected to a flue pipe 32leading to the smokestack or chimney which provides draft for theburner.

Designated at 33 is a clean-out duct aligned with duct portion 3| andintegrally formed in the wall of housing I6. Hinged to the outside ofthe housing wall is a door 34 normally closing off said clean-out duct.

The bottom door I4 is of the conventional furnace door type providedwith vents for the admission of air to the burner. The usual slidablecover plates may be provided for said vents to regulate the amount ofair admitted. Duct 32 may be likewise provided with an adjustable flapdamper to regulate the draft in the usual manner.

In operation, water in the jacket I 9 and in the flat vertically risingzig-zag conduit 2| is heated by the gaseous products of combustiongenerated by burner I2, said gaseous products travelling upwardly aroundthe conduit 2 I on both sides thereof past the inner ends of thealternating baffles 28 to the flue duct 3 I. The battle plates 28 guidesaid gaseous products substantially along the surfaces of the zig-zagconduit, requiring said products to flow through the passages 29adjacent the inside bends of the conduit. This maintains the gaseousproducts in close proximity to the surfaces of the conduit and assuresefflcient transfer of heat from the gases to the water in the conduit. Avery large heat transfer area for a given boiler volume is thusprovided.

It will be seen from Figure 2 that by opening the side door 20, accessto substantially all of the heat transfer surfaces of the zig-zag waterconduit 2| may be obtained. This enables said surfaces to be frequentlycleaned so as to maintain them in a highly efiicient condition. Theability to readily clean these surfaces makes it possible to operate theboiler economically as to fuel requirements, and also makes it possibleto bring the system up to working steam pressure in a very short periodof time.

Residual heat in the exhaust gases is transferred to the water in jacketI9 from the portion of flue 30 which extends through said jacket.

While a specific embodiment of a boiler for use in steam heating systemshas beendisclosed in the foregoing description, it will be understoodthat various modifications within the spirit of the in vention may occurto those skilled in the art. Therefore, it is intended that nolimitations be placed on the invention except as defined by the scope ofthe appended claim.

What is claimed is:

A boiler comprising a base, a casing having one end open positioned withits open end resting upon said base and secured thereto, a burnermounted within said base and in communication with the open end of saidcasing for generating heated products of combustion, a verticallydisposed serpentine conduit positioned within and fixedly secured to theback wall of said casing and bearing against the front Wall of thelatter and spaced from the opposed side walls of said casing, a secondcasing surrounding and fixedly secured to said first casing and spacedfrom the latter to thereby form a Water jacket, an inlet adjacent thelower end of said second casing for admitting water to be heated intosaid jacket,

an outlet in the top of said second casing for withdrawing the heatedwater from said jacket, a horizontally disposed pipe positioned withinsaid first casing adjacent the lower end thereof and having one end incommunication with said jacket and the other end in communication withthe lower end of said conduit, a second vertically disposed pipepositioned within and adjacent the upper end of said first named casingand having one end in communication with said jacket and the other endin communication with the upper end of said conduit, a plurality ofhorizontally disposed bafile plates positioned in opposed spacedvertical relation with respect to each other and fixedly carried by saidfirst named casing and forming with said serpentine conduit a tortuouspassage wa for the passage of products of combustion therethrough, anoutlet flue in communication with the upper end of said first namedcasing for Withdrawing the products of combustion from the first namedcasing.

GEORGE STEINER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 565,866 Winkle Aug. 11, 18961,462,018 Mason July 17, 1923 1,681,726 Brie Aug. 21, 1928 1,696,206Lange Dec. 25, 1928 1,908,125 Davidson May 9, 1933 2,176,061 CarruthOct, 1'7, 1939 2,210,891 Bork Aug. 13, 1940

